<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>活动管理</el-breadcrumb-item>
            <el-breadcrumb-item>活动列表</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
                </el-col>
            </el-row>
            <tree-table :data="cateList" :columns="columns" :selection-type="false"
                        :expand-type="false" show-index border :show-row-hover="false" style="margin-top: 15px;">
                <template slot="isok" slot-scope="scope">
                    <i class="el-icon-success" v-if="scope.row.cat_deleted==false" style="color: lightgreen"></i>
                    <i class="el-icon-error" v-else style="color: orangered"></i>
                </template>
                <template slot="order" slot-scope="scope">
                    <el-tag size="mini" v-if="scope.row.cat_level==0">一级</el-tag>
                    <el-tag type="success" size="mini" v-else-if="scope.row.cat_level==1">二级</el-tag>
                    <el-tag type="warning" size="mini" v-else>三级</el-tag>
                </template>
                <template slot="opt">
                    <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                </template>
            </tree-table>

            <el-pagination
                    @size-change="handleSizeChange"
                    @current-change="handleCurrentChange"
                    :current-page="queryInfo.pagenum"
                    :page-sizes="[3, 5, 10, 20]"
                    :page-size="queryInfo.pagesize"
                    layout="total, sizes, prev, pager, next, jumper"
                    :total="total">
            </el-pagination>
        </el-card>

        <el-dialog
                title="添加分类"
                :visible.sync="addCateDialogVisible"
                width="50%"
        @close="addCateDialogClose">
            <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
                <el-form-item label="分类名称:" prop="cat_name">
                    <el-input v-model="addCateForm.cat_name"></el-input>
                </el-form-item>
                <el-form-item label="父级分类:">
                    <el-cascader
                            expand-trigger="hover"
                            :options="parentCateList"
                            :props="casProps"
                            v-model="selectedKeys"
                            @change="handleChange"
                            clearable
                            change-on-select>
                    </el-cascader>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
    <el-button @click="addCateDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addCate">确 定</el-button>
  </span>
        </el-dialog>
    </div>
</template>

<script>
    export default {
        name: "Cate",
        data() {
            return {
                cateList: [],
                total: 0,
                queryInfo: {
                    type: 3,
                    pagenum: 1,
                    pagesize: 5
                },

                columns: [
                    {
                        label: '分类名称',
                        prop: 'cat_name'
                    },
                    {
                        label: '是否有效',
                        type: 'template',
                        template: 'isok',
                    },
                    {
                        label: '排序',
                        type: 'template',
                        template: 'order',
                    },
                    {
                        label: '操作',
                        type: 'template',
                        template: 'opt',
                    }
                ],
                addCateDialogVisible: false,
                parentCateList: [],
                casProps: {
                    value: 'cat_id',
                    label: 'cat_name',
                    children: 'children'
                },
                selectedKeys: [],
                addCateForm: {cat_name: '', cat_pid: 0, cat_level: 0},
                addCateFormRules: {
                    cat_name: [
                        {required: true, message: '请输入分类名称', trigger: 'blur'}
                    ]
                },

            }
        },
        methods: {
            async getCateList() {
                const {data: res} = await this.$http.get('categories', {
                    params: this.queryInfo
                });
                if (res.meta.status != 200) {
                    this.$message.error("获取商品分类失败");
                }
                this.cateList = res.data.result;
                this.total = res.data.total;
            },

            handleSizeChange(newSize) {
                this.queryInfo.pagesize = newSize;
                this.getCateList();
            },

            handleCurrentChange(newPage) {
                this.queryInfo.pagenum = newPage;
                this.getCateList();
            },

            showAddCateDialog() {
                this.getParentCateList();

                this.addCateDialogVisible = true;

            },

            async getParentCateList() {
                const {data: res} = await this.$http.get('categories', {params: {type: 2}});
                if (res.meta.status != 200) {
                    this.$message.error("获取商品分类列表错误!");
                }
                this.parentCateList = res.data;
            },

            handleChange(){
                if (this.selectedKeys.length>0){
                    this.addCateForm.cat_pid=this.selectedKeys[this.selectedKeys.length-1];
                    this.addCateForm.cat_level=this.selectedKeys.length
                    return
                }else {
                    this.addCateForm.cat_pid=0;
                    this.addCateForm.cat_level=0;
                }
            },

            addCate(){
                this.$refs.addCateFormRef.validate(async valid=>{
                    if (!valid){
                        return;
                    }
                    const {data:res} = await this.$http.post('categories',this.addCateForm);
                    if (res.meta.status!=201){
                        this.$message.error("添加商品分类失败!");
                    }
                    this.$message.success("添加商品分类成功!");
                    this.addCateDialogVisible = false;
                    this.getCateList();
                })
            },

            addCateDialogClose(){
                this.$refs.addCateFormRef.resetFields();
                this.selectedKeys=[];
                this.addCateForm.cat_pid=0;
                this.addCateForm.cat_level=0;
            }
        },


        created() {
            this.getCateList();
        }
    }
</script>

<style scoped lang="less">
    .el-cascader {
        width: 100%;
    }
</style>